OK, where in the bible does Jesus say that His kingdom on only spiritual and not physical? After His resurrection Jesus was both physical and spiritual. This is clearly stated in the gospels and also the book of Acts among other parts of scripture.
Please consider the spiritual nature of the Kingdom:
“And saying, Repent ye: for the kingdom of heaven is at hand.” (Matthew 3:2) (KJV 1900)
“And from the days of John the Baptist until now the kingdom of heaven suffereth violence, and the violent take it by force.” (Matthew 11:12) (KJV 1900)
“Verily I say unto you, There be some standing here, which shall not taste of death, till they see the Son of man coming in his kingdom.” (Matthew 16:28) (KJV 1900)
“Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; neither doth corruption inherit incorruption.” (1 Corinthians 15:50)
“Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God.” (John 3:3) (KJV 1900)
“Jesus answered, “I tell you the solemn truth, unless a person is born of water and spirit, he cannot enter the kingdom of God.” (John 3:5)
“Jesus answered, My kingdom is not of this world: if my kingdom were of this world, then would my servants fight, that I should not be delivered to the Jews: but now is my kingdom not from hence.” (John 18:36) (KJV 1900)
“And when he was demanded of the Pharisees, when the kingdom of God should come, he answered them and said, The kingdom of God cometh not with observation:” (Luke 17:20) (KJV 1900)
“Neither shall they say, Lo here! or, lo there! for, behold, the kingdom of God is within you.” (Luke 17:21) (KJV 1900)
“But if I cast out demons by the finger of God, then the kingdom of God has already overtaken you.” (Luke 11:20)
“The law and the prophets were until John: since that time the kingdom of God is preached, and every man presseth into it.” Luke 16:16 (KJV 1900)
“because we are not looking at what can be seen but at what cannot be seen. For what can be seen is temporary, but what cannot be seen is eternal.” (2 Corinthians 4:18)
“Now when the people saw the miraculous sign that Jesus performed, they began to say to one another, “This is certainly the Prophet who is to come into the world.” Then Jesus, because he knew they were going to come and seize him by force to make him king, withdrew again up the mountainside alone.” (John 6:14–15)
“He delivered us from the power of darkness and transferred us to the kingdom of the Son he loves,” (Colossians 1:13)
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When Jesus saw that he answered intelligently, He said to him, “You are not far from the kingdom of God.” And no one dared to question Him any longer.” (Mark 12:34) (HCSB)
“for the kingdom of God is not eating and drinking, but righteousness, peace, and joy in the Holy Spirit.” (Romans 14:17) (HCSB)
“I, John, your brother and fellow partaker in the tribulation
and kingdom and perseverance which are in Jesus, was on the island called Patmos because of the word of God and the testimony of Jesus.” Revelation 1:9 (NASB95)
“But when they believed Philip preaching the things concerning the kingdom of God, and the name of Jesus Christ, they were baptized, both men and women.” Acts 8:12 (KJV 1900)
“That ye would walk worthy of God, who hath called you unto his kingdom and glory.” 1 Thessalonians 2:12 (KJV 1900)
“And he went into the synagogue, and spake boldly for the space of three months, disputing and persuading the things concerning the kingdom of God.” Acts 19:8 (KJV 1900)
“And when thy days [David] be fulfilled, and thou shalt sleep with thy fathers, I will set up thy seed after thee, which shall proceed out of thy bowels, and I will establish his kingdom. He shall build an house for my name, and I will stablish the throne of his kingdom for ever.” 2 Samuel 7:12–13 (KJV 1900)